Kahil M.E.Modern Sciences and Arts UniversityGizaEgypt; Egyptian Relativity GroupCairoEgypt2020-01-092020-01-0920182022893https://doi.org/10.1134/S0202289318010103https://arxiv.org/abs/1701.04136ScopusThe problem of spinning and spin deviation equations for particles as defined by their microscopic effect has led many authors to revisit non-Riemannian geometry describing torsion and its relation with the spin of elementary particles. We obtain a new method for detecting the existence of torsion by deriving the equations of spin deviations in different classes of non-Riemannian geometries, using a modified Baz anski method. We find that the translational and rotational gauge potentials regulate the spin deviation equation in the framework of the Poincare gauge field theory of gravity. 2018, Pleiades Publishing, Ltd.EnglishOctober University for Modern Sciences and Artsجامعة أكتوبر للعلوم الحديثة والآدابUniversity of Modern Sciences and ArtsMSA UniversityArticlehttps://doi.org/10.1134/S0202289318010103